History textbook: "During the next four decades, the United States and the Soviet Union developed and stockpiled increasingly powerful nuclear weapons. They armed planes, submarines, and missiles with nuclear warheads powerful enough to destroy each other many times over. Both sides hoped that this program of mutually assured destruction would prevent either country from actually using a nuclear device against the other."
Me: ????????
Doctor Who: "Both sides are capable of completely obliterating the other. It's a state we call mutually assured destruction."
Me: Ohhhhh.

History textbook: "During the next four decades, the United States and the Soviet Union developed and stockpiled increasingly powerful nuclear weapons. They armed planes, submarines, and missiles with nuclear warheads powerful enough to destroy each other many times over. Both sides hoped that this program of mutually assured destruction would prevent either country from actually using a nuclear device against the other."
Me: ????????
Doctor Who: "Both sides are capable of completely obliterating the other. It's a state we call mutually assured destruction."
Me: Ohhhhh.